我举例说明吧.Mary is beautiful,so are you.玛丽很漂亮,你也是.因为前半句是is,所以后半句应保持一致,用be动词are.再来一个句子,Mary likes reading,so do you玛丽喜欢阅读,你也喜欢.因为likes reading是动词,所以...